By Lucy Chaudhuri

Published: Wednesday, 30 November 2022 at 12:00 am


What is blues music and why is it called blues music?

Blues is both a musical form and a musical genre. Blues gets its name from its original association with melancholy subjects and sounds: when we have ‘the blues’, we’re feeling sad. However, blues has since developed to address other subjects and emotions, adopting a wider purpose of ‘chasing the blues away’ with music.

The main features of blues include: specific chord progressions, a walking bass, call and response, dissonant harmonies, syncopation, melisma and flattened ‘blue’ notes. Blues is known for being microtonal, using pitches between the semitones defined by a piano keyboard. This is often achieved on electric guitar using a metal slide for a whining effect. As a result, blues can be heavily chromatic.

What is a blues scale?

The blues scale – from which most of the melody, harmony and improvisations are composed – is a six-note scale that consists of the minor pentatonic scale plus an extra flattened fifth note. There are also longer variations of the blues scale that use further chromaticism, most notably flattening the third, fifth and seventh notes.

The most common blues form is the twelve-bar blues, though musicians will sometimes favour the eight or 16-bar blues forms. The twelve-bar blues uses a basic chord progression of: I I I I – IV IV I I – V IV I I. This is normally accompanied by an AAB structure for its lyrics, utilising the popular call-and-response element that blues originated from.

As blues has developed over the years, it has encouraged a number of subgenres to flourish, often including hybrids with other genres, including blues rock and country blues. Other subgenres are defined by their development within a certain place, such as Chicago blues and Delta blues.